<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            /* position: relative; */
            width: 200px;
            height: 300px;
            background-color: skyblue;
        }
        
        div::after {
            content: "右白虎";
            /* position: absolute; */
            width: 50px;
            height: 50px;
            background-color: pink;
            /* display: block; */
            float: right;
            font-size: 14px;
        }
    </style>
</head>

<body>
    <div>
    </div>
</body>

</html>